Drilling machinery



Aug. 13, 1929.

A. M. SOSA ET Al.

DRILLING MACHINERY Filed June 13, 1927 3 Sheets-Sheet l l 4 Iigl- 'Y /69 i l' i /se 4 [90. ,82

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MILLING mourut-:M

Filed June 13, 1927 3 Sheets-Sheet 2 Aug- 13, 1929- A. M. sosA ET AL 1,724,430

DRILLNG MACHINERY Filed June l5, 1927 5 Sheets-Sheet 5 so 7a 919 5565 6a 73 79 al az l a3. 84 J 6,4

;L 76 7 7 4 K5 5 5 67 wx??? l/l 6a f6/ 59 /os /07 /06 62 6o 6s 3] Illy l /N VEN 70H5 Patented Aug. 13, 1929.

o 1,124,436 raramoFrIc-e.

AUGUSTUS M. sosa, or CINCINNATI, ANI) WILLIAM e. 'HoELscHEa or NoRwoon, oIIIo, AssIGNons To THE AMERICAN TOOL A'womrs COMPANY, or cIN :I1\11\IA'rI,

OHIO,` A CORPORATION VOlli' OHIO.

. DRILLING MAcIIINEaN. l i

Application led June 13,

Our invention relates to drilling machinery, especially to the type knownl as sensitive drills, in which high speeds of rotation of the tool-spindle are employed.

It is the object of our invention tov providenew and improved meansV for ycausing rotation of the tool-spindle; further to provide new and improved means for rotating the tool-spindle at high speeds without jar and at uniform rate at the tool-spindle; further, to provide novel means whereby reversals of rotation of the tool-spindle are instantly obtained; and, further, to provide novel means for quick cessation of rotation of the tool-spindle. v

It is the object `of the invention, further, to provide la novel belt drive for the toolspindle capable of imparting reversals of rotation to the tool-spindle and comprising a pulley and an endless belt located wholly in adj acency to the tool-spindle; further, to

provide a laterally adjustable head for the' tool-spindle and a belt drive for the toolspindle comprising an endless belt and pulleys movable wholly with the drill-headin the adjustments of the latter; further, to. provide a drill-head adjustable laterally lengthwise along a drill-arm and a crossshaft extending lengthwise of the drill-arm, and belt driving means between said crossshaft and the tool-spindle in thefdrill-head, movable wholly with the drill-head lengthwise of said drill-arm and said cross-shaft during the adjustments of the drill-head; further, to provide novel belt driving means between an upright shaft and said cross-shaft wholly separate from the belt driving means between said cross-shaft and said tool-spindle; and, further, to provide novel belt driving means between a drive shaft and said upright shaft wholly separate from said belt driving means between said upright shaft and said cross-shaft and said belt driving means between said crossshaft and said tool-spindle.

The invention will be further readily un-f derstood from the following description and claims, and from the drawings, in which latter:

Fig. l is a front elevation of a drilling machine embodying the invention, withV parts partly broken away for better illus yration of the invention.

192'?.` seriai No. 198,424..

ing the belt driving means.

Fig. 4 is a detailse'ction, takenl inthe plane'of the line le-4 of Fig. 1. j

Fig. 5 is an end elevation of the mechanism partly broken away, and partly in vertical sectionin the plane yof the line 5-'-5 of Fig. ..4 l' f Fig. 6is a rearview of the same, 'partly broken away, and partly injvertical section in the' plane of thev irregular line -6 6 of Fig.5. j 4 5" Fig. 7 is a cross-section ofjthe same, taken` in the plane ofthe line 7-7; of Fig. 5. v Fig. 8 is a vertical section of the "same, taken in the plane ofthe line 8*:-8'of Fig. 5. Fig. 9 is a vertical section of the same, taken in the plane ofthe irregular line 9-9-of Fig. 5, and partly broken away; and, Fig. 10 is a vertical section of aldetail ofV the same, partly broken away, taken in the plane'of'the ylineV 10-10 of Fig. 5.

The drill-spindle 2l is exemplied as journaled in 'a drill-head 2 2. Suitable means are provided for moving andv feeding the drill-spindle axially, which may be of ordinary or usual construction and controlled'b'y suitable means, such feeding andv controlA means not being more particularly shown or described, as the same may be of any desirable constructionfaiid their functions are well known. 'j

The drill-spindle has ajpulley 2,5 ftheref about,v 'suitably rotatively connected with the drill-spindle, for permitting axial'movement of the'drill-,spindle inthe pulley, as by secur-V 1 pulleys 32,' 3?, arranged to beselectively iXed 4to the crossshaft' lf or'bei'ng rotateiilthereby. When one1 ofthesepulleys is Xed to' the cross-shaft,pthe otherv rotates loosely thereabou'tl fand serves asan idler pulley. Direction pulleys 34, 35, 'are located between the pulley about the`drill-spindle and said" pair of driving pulleys'lfor Achanging the di.

rectio'n Aof 'a belt 36 received about said 55` A Figf'is a diagrammatic view exemplifyslot 44, in the drill-head' an adjusting bolt 45 being threaded in said axle and journaled ina hole .46, in the drill-head. A nut-47.` is

rthreaded'to said axle at one end of the slot,

a washer 48 at the, other end of the slot being received about the threaded reduced ..A end-'49V of the axle,t a nut 5.0 about SaidA threadedL endclamping. the axle endwise tothewall of the ydrill-head in which said slot is located, for positioning the pulley 41. l The endless belt is received loop-wise about the adjustable. idler pulley 41, the respective stretches of the belt being, received about the Y driving pulleys 32, 33, and the direction pulleys 34, 3 5?, and. loopwise about the pulley about the drill-spindle. Belt guards 51,I

.. 52 are vfixed toa' rod; 53, fixedd in bearings 54 on the. drill-head. ZhenV one of the driving pulleys isv fixed to the. cross-shaft, the belt moves 'iny one direction for rotating the drillspindle4v in a givenl direction, the other drivingpulley serving as an idler. When the kist-nained,y driving pulleyl isl fxedto` the cross-shaft, the. belt travels in, the opposite direction for rotatingthe.drill-spindle in the opposite. direction, the first-named; driving .l y pulley thenserving as. an idler pulley.

The means. for fixing the respective driving pulleys tothe cross-shaft preferably cornprise .meansfwhich will transmit thel driving torque without jar and which, will.v fluently convey great power andihi-gh'speeds. These ,Y ends-fof the: y

`68`, 69 i'nwhich, the., friction. disks, are

means are exemplifiedy Yas multiple disk friction clutches 55, 56.

The cross-shaft hasA a sleeve 5,7 rotatable therewithy andv freely translatable; lengthwise ofthe cross-shaft,4 there. being., spline-groove and` vkey connection 58, between the crossshaft and. said sleeve. Collars 59.-, 60,- areV secured to; the sleeve, and are. provided with flanges. 61,6%? provided with, slots 63 at suit-.,

able points around their circumference,

which levers. 64, areA located, theI levers being pivoted on pins, 65.,

The respective frictionclutches: comprise sleeves 66,` '67 j ournaledl about the respective sleeveL 5 7 and, comprise sockets received. Ball-bearings 7.0, 71, are located betweensaid pair of` sleeves andthe drillhead, the outer raceivays. of; said balli-bearings being held endwise-inbushings` 72, 7.3, 1R

said]c'hilllhead.y The inner raceways of' said ball-bearings are held endwise between annular shoulders 74, 75, in said Vpair of sleeves and the hubs 7 6., 77, of the pulleys 32, 33. These hubs have key connections 78, 79, with said pair of sleeves, the hubs and inner raceways' of said ball-bearingsv being fixed endwise between'said shouldersY and nuts 80, 81, threaded about the outer threaded endsy of said pair of sleeves. movements of the pair of sleeves is limited by means of nuts, 82, 83, threaded to the respective ends of thesleeve 57 and fixed thereto by means of set-screws 84.

Each of the clutches comprises end., abutment disks 91;, 92, and intermediate disks 93 94. The disks 93 have tongue and groove Outward axial connections 95 with the collars 59,.v 60, re-

spectively, which are iixedto thev inner sleeve 57 ,K and the disks 94 have tongue and` groove connections 96 with the outer sleeves. 6.6,` 67, respectively. When these disks are pressed towardl each other, friction clutch v:

connection is made between the inner sleeveand the outer sleeve for rot-ating the pulley fixed tothe outer sleeve.

The pulleys 32, 33, are respectively provided with hollows 101 in which thelateral extensions 102 ofthe drill-head are received, the pulleys being received about thek ballbearings therefor and the clutches for the same. e Each of the clutch-levers 64 is provided, with. a contact-face 103. arranged to engage one of the contact disks 92 to press the disks of the friction clutch toward each other. Recession of said contact-face from 'the frictionA disks releases'the frictionl clutch and permits the pulley? to rotate freely about the inner sleeve. The respective clutch-levers are provided with heels 104. .The heels of' the respective clutches project toward each Other and are arranged to be engaged by annular conical faces Collar 107 shift-able axially along the inner sleeve and having spline-groove and kev connectionA 108 therewith. The inclinedl or conical faces, of said collar terminate -in cylindrical faces 109, 110at their inner ends', with which the shoes when the shifting collar has been; shifted to its full. extent for full engagement of the clutch. f

rPhe shifting; collar isr provided with an annular groove 111 inV which a shoe 112: is received the shoe'having articulating connection with afork 113, fixed to a rock-shaft 114, journaled inl bearings 1l5-ink thev drill;- head. An arm` 116 is lfixed to saidrock-shaft and has a segment gear 117 thereon, which ismeshed by a segment gear 118 onanl arm 119, lixed to a shaft 120 journaled in bear-l ings 121, 122in the drill-head. This shaft has.v a bevel pinion4 1231 thereon, which' is. meshed by a bevel pinion 12.4, tixed to a-v control shaft 125, journaled ini bearings 126.

ofr the` levers', coactz,

105, 106,011v a shiftable Y of the drill-head. The control shaft has a control arm 127 fixed thereto, which is provided with a handle 128. Manipulationof the control arm causes shifting of the shifting collar 107 for causing engagement of either clutch or placinvv the control collar in neutral position for release of both clutches.

We do not herein claim the construction orthe arrangement of parts or details of the friction clutches or reversing mechanism herein shown and described, having shown, described and claimed the same in a copending applicationfor patent on improvements in clutching mechanism, Serial No. 198,425, filed in the United States Patent Ofiice June 13, 1927, and issued as patent No. 1,660,585, dated February 28, 1928.

Braking means are provided for the drillspindle which are locatedv on a rotative element in close adjacency to the drill-'spindle in order that the braking means may be effective upon a rotative part rotating at high speeds, whereby more Veffective and quicker braking is obtained. The brakingl means are exemplified as a brake-drum 131 about the drill-spindle, being secured to the sleeve 26. Levers 132, 133, are pivoted on pins 134, 135, on the drill-head and are provided 'with brake-shoes 136, 137. A spring 138, whose respective ends are secured tosaid levers, urges said brake-'shoes toward the brakeclrum. Means are provided for controlling thefmovements of said brakeshoes toward each other and for engagement of the brake-drum by the shoes when the Vclutches 55, 56, are in release relation for in V quic adjusted positions.

quick stoppage of rotation of the drillspindle between engaged relations of the clutches, which is especially useful during tapping operations or when reverse rotations k successions of the tool-spindle are desired.

Control arms 141, 142, extend from opposite sides of a rock-shaft 143 journaled` in a bearing 144 in the drill-head. These control arms are fixed to said rock-shaft and have cram-plates 145, 146, secured thereto respectively. These cam-plates are provided with central notches 147 and with side notches 148, 149, the inner walls of the central notches being closer to the axis of the rock-shaft 143 than the inner, walls of the sidenotches. The respective levers are providedpwith rollers 151, 152. Each of the rollers isjournaled in ka fork 153 of astem 154, adjustably axially in a bearing 155 in the end of the brake-lever. A set-screw 156 is threaded in the outer ends of said bearing and limits the outward movements of said stem, a jamb-nut 157 holding said screw in When the rollers 151, 152, are in the notches 147, the brake-shoes 136, 137, engage the brake-drum 131, and when said rollers are in the notches 148, 149, the brake-shoes are out of engagement. The

positioning of said rollers 'in said respective notches holds the control-armr 127 in adjusted position- 1 The 'drill-head examplified is adjustable laterally on ya drill-arm161, as by means of a pinion 162, operated by a handle 163. The pinion meshes with a rack 164 extending lengthwise of the arm and fixed to' the arm. The drill-head is slidable in guideways 165, 166, on the arm, and isclamped kin adjusted positions to thearm by usual means.

Lateral adjustment of the -drill-head also carries the endless belt36and the pulleys about which the same is received, the'whole` of the belt and allof the pulleysinoving with the drill-head. A comparatively short endless belt may be provided with such construction, and iirm driving of the tool-spindle at all times assured, and flapping and uneven running of the belt avoided.

The drill-arm is shown mounted ona column 171, extending upwardly from a base' 172, and is adjustable up and down on the column 'for ,adjusting the height ofthe drillarm, as by anelevating screw V173 threaded in a suitable nut in the drill-arm and operated kin usual manner. The column is -rotatable'on suitable bearings about a post 174 extending rigidly upwardly fromthe base, and is arranged to be clamped in adjusted positions by a usual clamp 175 at the bottom of the column, permitting the vdrill-'arm'to be placed in desirable radial'positions. The

drill-arm is provided with a clamp-bearing 176 for clamping the drill-arm in adjustedv elevational position.

tioning the drill-arm in radial positions, are not more fully shown and described, for any suitable means for accomplishing these pur-- poses well-knownin the` arty may be provided.

It is ypreferred that the vcross-shaftl fbe driven by means of belting lin order that high speeds withoutnoise or vibration 'may be obtained. An upright shaft 181 is journ'aled in bearings 182, `183-,in the', post, and

has a pulley 184 fixed to it at its upper end.A The cross-shaft '31 has a pulley`185 fixed` A pair of direction pulleys 18,6,

The means for rais` ing and lowering the drill-arm, and posi*-y are interposedy between said pulleys and said studs.l v

A pulley 201is mounted on the column lower than the cross-shaft. This pulley is preferably adjustable for adjusting the tension of avbelt 202. 'd

The belt 202 is received loopwise about the pulley 184 at the top of the upright shaft,

therespective stretches ofthe belt being received over the direction pulleys 186, 187. One of these stretches is received about the pulley 185 between the pulleys 191, 192, the

- lower end of the belt being received loopwise about the pulley 201. l/Vhen the drill-arm isadjusted upV or down, the pulleys 185, 191, 192,. are adjusted to similar extent lengthwise of they stretch of the belt with' Vwhich they cooperate for maintaining driving relation between the belt and the pulley 185 ony the cross-shaft. All of these pulleys also move with thel drill-arm during adjustments to different radial positions.

The adjustment of the pulley 201 may be accomplished by mounting the same on a ball-bearing 205 on' an. axle206 adjustable ina slot 207 in a bracket 208 extending from the column. The adjustment is obtained by an adjusting serewl 209 threaded in the axle and journaledin the bracket. The axle is clamped in ad-justed positions by jamb-nuts 211., 212, threaded over threaded portions of said/axle at the-respective ends of said slot, and. washers 213, 214, between said nuts and the respective ends ofthe wall of said slot. The belt 202 serves the purposev solely of form-ing driving connection between the-upright shaft and theHcross-shaft and is entirely separate from the belt 36 which forms the driving connection between thel crossshaft and the tool-spindle.y 4

vAn endless belt 221 is received loopwise about a pulley 222 at the lower end of the upright shaft, and loopwise about a pulley 223 oni a drive-shaft 224, journaled in suitable manner, as in bearings 225, 226, on the base of the machine. The respective stretches ofthe belt 221 are receivedl over direction pulleys 227,228, rotating. freely about an axlev229, as by means of ball-bearings 230.

The axle: 229 is fixed ina bearing 2,31 which forms a slide 232 adjustable on the base,.as by means of set-screws 233. This adjustment Y isfor the purpose of. tightening the belt 221. rlhe direction pulleys 227, 228, are shown adjustable lengthwise of the drive-shaft 224.

To comv ensate for such adjustments the pul-4 ley 223 1s. shown provided with an elongated outer peripheral face, so that the belt 221 `may be received thereabout at any point in its'length. Thel drive-shaft may rotated at selective speeds, as by means of a belt 234 received about therespective steps of a conev pulley235 andof a ley not shown.

complemental cone pul- The endless belt 221v is independent of the belt 202andl of the belt 36. These belts, being independent of each other, are permitted to have independent adjustments for tension ofthe same," so that the power requirements of eachof lthe belts may be independently served'. Each ofthe belts is also of comparatively short length, so as to avoid flapping what we claim as new, and desire to secure by Letters Patent, is: i

1. In a kdrilling machine, the combination of an upright frame part,a drill-arm extending therefrom, means for shifting said drillarm, an upright shaft extending lengthwise of saidfupright frame part, a drill-head on said drill-arm, a drill-spindle on said drillhead, a cross-shaft extending lengthwise of said drill-arm, drivingmeans between said cross-shaft and said spindle, means for ro.- tati-vely driving' said upright shaft, a pulley having` an upright axis of-rotation on said upright shaft, a stationarily positioned pulley having asubstantially horizontal axis of rotation, a pulleyy having a substantially horizontal axis of rotation on said crossshaft between said first-named pulleys, direction pulleys having substantially horizontal axes of rotation between said firstnamed pulley and said other named pulleys,

idler pulleys having substantially horizontal axes of rotation respectively above and: below said Vpulley on said cross-shaft, and an endless belt about said pulleys,f and constructed and arranged for maintaining driving relation withv said pulley on said crossshaft throughout adjustments of said drillarm.

. 2'. In a drilling machine, the combination of an upright frame part, an upright shaft extending lengthwise of said upright frame part, a drill-arm, means for adjusting said drill-arm up and down on. said upright frame part, a horizontal cross-shaft on said drill-arm and movable therewith, a horizontal cross-shaft at the base of said upright frame part, belt driving means between said last-named cross-shaft and said upright shaft, an idler pulley having a substantially horizontal axis of rotation below said firstnamed cross-shaft, a pulley on said firstnamed cross-shaft, idler pulleys having substantially horizontaly axes of rotation substantially parallel with said first-named cross-shaft above and below said last-named pulley, a pulley at the upper end of said up` right shaft, a p air ofdirection pulleys havingy substantially horizontal axes of rotation at substantially right angles to said lastnamed axes of rotation between said last-- named pulley and said idler pulleys,and. an

said idler pulleys and said pulley on said rst-named cross-shaft.

3. In a drilling machine, the combinationy of an upright frame part, an upright shaft extending lengthwise of said upright frame part, a cross-.shaft at the base of said upright v frame part, a belt about said cross-shaft and said upright shaft for driving said upright said upright frame part, a cross-shaft thereon,4 a belt about said upright-,shaft and. said second-named cross-shaft for driving' said second-named cross-shaft, a drill-head" adljustable laterally lengthwise of said drillarm, a tool-'spindle journaled thereon, and a belt about said second-namedv cross-shaft and-l said spindle for driving said spindle, said belts being separate from each other, and meansv whereby said last-named belt is shiftable laterally with said drill-head and said tool-spindle with relation to said other twonamed belts.

4. In a drilling machine, the combination of a laterally movable drill-head, a toolspindle journaled thereon, apulley about said tool-spindle for driving the same, a cross-shaft extending crosswise of said head along which said head is laterally movable, a pair of pulleys about said cross-shaft translatable laterally along said cross-shaft, means for selectively connecting said lastnamed pulleys with said cross-shaft, a pair of direction pulleys journaled on said drillhead above said last-named pulleys at the respective sides of said first-named pulley, an idler pulley journaled on said drill-head above and between said pairs of pulleys, a drive belt received about said pulleys and comprising loops received respectively about said first-named pulley and said last-named pulley, and means for adjusting said lastnamed pulley toward and from said pair of direction pulleys for adjusting the tension of said belt.

5. In a drilling machine, the combination of a laterally movable drill-head, a toolspindle journaled thereon, a pulley about said tool-spindle for driving the same, a

cross-shaft extending crosswise of said head along which said head is laterally movable, a pair of driving pulleys about said crossshaft translatable laterally along said crossshaft, a pair of direction pulleys journaled on said drill head above said last-named pulleys at the respective sides of said firstnamed pulley, an idler pulley journaled on said drill-head above and between said pairs of pulleys, a 'drive-belt received about said pulleys and comprising loops received respectively about said first-named pulley and said last-named pulley, a rotatable brakemember about said tool-spindle rotatable therewith, a brake-element coacting therewith, means for selectively connecting the pulleys of said first-named pair of pulleys.

with said cross-shaft, and connected control means for said last-named means and said brake-element.

l6. In a drilling machine, the combination of a laterally movable drill-head, a toolspindle journaled thereon, a pulley about said toolsp'indle-'for 'driving the same, a cross-shaft extending crosswise of? said' head' along which said head -is laterally movable, Y

a pair of pulleys about said cross-shaft translatable laterally along said cross-shaft, a

pair of direction pulleys journaled4 ori-said drill-head above said last-named pulleys atv the respective Vsides ofA said first-named" pulley, ani/idler: pulley journaled on said drill-head above and'Y betweenV said' pairs of pulleys, a drive-belt receivedr about' saidy pulleys, and comprising loops received respectivelyy about said first-named pulley and said last-named pulley, a rotatable brakemember received about and rotatable with said tool-spindle, brake levers at the respective sides thereof, connecting means for selectively connecting the pulleys of said rst-named pairs of pulleys with said crossshaft and for neutral relations between said pair of pulleys and said cross-shaft, and control means for said last-named means and said pair of brake-levers arranged for release relations of said brake-levers during connected relations in said connecting means and braking relation of said brake-levers during neutral relation of said connecting means.

7. In a drilling machine, the combination of an upright frame, a` drill-arm extending therefrom, a drill-head on said drill-arm, a normally substantially upright drill-spindle on said drill-head, a horizontal cross-shaft extending lengthwise of said drill-arm, said cross-shaft and said drill-spindle distanced from each other, a train of driving means between said cross-shaft and said drillspindle, said train of driving means including a pair of oppositely rotatable driving elements substantially concentric about said cross-shaft, clutches substantially concentric with said cross-shaft between said crossshaft and said respective rotatable driving elements, a brake comprising a braking element having an axis of rotation distanced from the axes of rotation of said rotatable driving elements and having operative connection with said drill-spindle, and control means having operative connections with said respective clutches and with said brake for normal braking relation in said brake and for release relation in said brake upon clutching relation in either of said clutches, and said clutches and said brake being at substantially opposite ends of said train of driving means between said cross-shaft and said drill-spindle.

8. In a drilling machine, the combination of an upright frame, a drill-arm extending therefrom, a drill-head on said drill-arm, a normally substantially upright drill-spindle on said drill-head, a horizontal cross-shaft extending lengthwise of said drill arm, a pair of oppositely krotatable driving pulleys about said cross-shaft, a pulley about said drill-spindle, intermediate direction pulleys between4 said last-named pulley and said pair of pulleys, an endless belt received 5"lo`opWise about said pair of oppositely rotatable pulleys and said pulley about said drill-spindle and over said intermediate direction pulleys, a brake substantially coaxial With said drill spindle, clutches sub- 10 stantially concentric with saidl cross-shaft lbetween said cross-shaft and said respective rotatable driving pulleys, said brake and said clutches being adjacent to opposite ends of said loop of said driving belt, and control means having operative connections With said respective clutches and with said brake for normal braking relation in said brake and for release relation in said brake upon clutching relation in either of said clutches.

In testimony whereof, We have hereunto signed our names.

AUGUSTUS M. SOSA. WILLIAM G. HOELSCHER. 

